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(11) | EP 1 496 638 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Packet transceiver apparatus using retransmissions and adaptive modulation |
| (57) Disclosed is a packet receiving apparatus in a communication system for transmitting
a packet signal upon changing over a parameter of a transmit signal in accordance
with conditions of a propagation path, and, when the packet signal cannot be received
correctly on a receiving side, retransmitting the packet signal, combining the packet
data received previously and the retransmitted packet data and executing decode processing
based upon the combined packet data. The receiving apparatus is such that if the propagation
path conditions at the time of retransmission are inferior, part of the packet data
extracted from a buffer is cut out and combined with a retransmission packet and decode
processing is executed based upon the result of combining. If the propagation path
conditions at the time of retransmission are superior, data of a plurality of packets
to undergo retransmission combining is extracted from the buffer, the extracted data
is combined with part of a retransmission packet and decode processing is executed
based upon the result of combining.
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